/Engine/Source/Runtime/Engine/Classes/AI/NavigationSystemBase.h
namespace ENavigationLockReason { enum Type { Unknown = 1 << 0, AllowUnregister = 1 << 1, MaterialUpdate = 1 << 2, LightingUpdate = 1 << 3, ContinuousEditorMove = 1 << 4, SpawnOnDragEnter = 1 << 5, } }